A Foreign Office spokesman said:
"We are aware that a British national has been reported missing in Queensland, Australia.
"Consular staff in Brisbane are in contact with Australian police who are conducting the search.
"We are providing consular assistance to the family in the UK at this difficult time."
More top news
The number of millionaires living in London has shot up in the part five years but other parts of the country are catching up.
A three-year-old girl had to undergo surgery to remove an air rifle pellet after she was shot in a west London park.
There has been a sharp rise in the use of bailiff amongst London's local authorities.